fix #961 Add timeout after focus or blur action, on some tests.

Fix theses tests on IE 11:

test.aria.widgets.form.multiselect.checkFeatures.MultiSelect
test.aria.widgets.form.multiselect.issue223.MultiSelect
test.aria.widgets.form.multiselect.issue312.AutoComplete
test.aria.widgets.form.multiselect.onblur.MultiSelect
test.aria.widgets.form.timefield.checkFormat.TimeField
test.aria.widgets.form.timefield.checkValue.TimeField
test.aria.widgets.form.passwordfield.PasswordField

Close #950
fix #958 Adaptation of test.aria.widgets.form.autocomplete.expandbutton.test3.ExpandButtonCheck for IE11

Close #950
fix #950 Adaptation of the test
test.aria.templates.visualFocus.VisualFocusTestCase for IE11

The template focus is now done in an asynchronous way.

Close #957
fix #951 Enable back test.aria.templates.keyboardNavigation.TableNavTestCase on IE <= 8

This commit is a new fix for the issue that commit 8fcb1826e247320e3730a19e9736b2ecee12c148
tried to solve, and which was reverted in commit 82b8cbf1ea1682361fac60ccef35d558c6aa6bba.